How to use OpenVPN without login and password

It can be cumbersome to type in the login and password every time you connect using OpenVPN. It has a feature named auth-user-pass where you can provide the login and password in a file.

• Put your login and password in a file, one on each line.

• If you are using a OpenVPN config file to connect, indicate the above file in it:

auth-user-pass /path/to/file

• You can also provide this at the command by passing it to the --auth-user-pass option.

Tried with: OpenVPN 2.3.7 and Ubuntu 15.10